add new binaries, update #2686
test also on OSX
reset env for 2.0.0 on travis to
rvm use ruby-2.0.0 --fuzzy - for tests
install gawk with apt-get only when it is available
safe test for apt-get
empty default patches for movable ruby-* on osx
safe sed for ~/.rvmrc in tests
do not force extra rubies environment cleaning
install git in smf only when no git already available
disable osx ruby docs, closes #2656
use remove_digest_so.patch on osx for static ruby-head